The author, who has begun to have symptoms of hay fever such as sneezing and itchy eyes from this week. I'm going out with full masks and glasses, so I'd like to spend some time at home, but why doesn't my symptoms subside?

The cause may actually be the "outside air" that allows intrusion without your knowledge.


According to Dr. Norihiro Kiyomasu, who is active as an allergist, it is said that about 60% of the pollen invasion route into the room is due to "ventilation". In the ventilation of a house in early spring, it is said that it is necessary to prevent invasion as much as possible by "not opening the windows fully" and "using curtains", and to remove the pollen that has entered by using a vacuum cleaner or an air purifier.

Also, since fine particles invade through the air even when the windows are closed, it is very effective to equip the air inflow path into the room with a high-density filter such as a HEPA filter. ..

So what exactly is there? I've searched for countermeasure goods that I can do right away, so I'll introduce them!

◆ "Air supply port" that is small but cannot be underestimated

As one of the 24-hour ventilation systems, the air supply port is now installed in 54% of Japanese houses. Pollen also enters through this small hole that constantly replaces the air.


The filter for the air supply port of the "Filterlet Air Purification Filter" series sold by 3M Japan is cleaned by reducing air pollution such as pollen and PM2.5 just by installing it inside the air supply port. A sheet that can take in air.


◆ Be careful of ventilation during cleaning! "Filter for screen doors"

When cleaning a room, you want to open the windows to take in fresh air. I mentioned earlier that you should avoid full throttle, but Nitoms' pollen filter for screen doors, which is attached to the screen door, can block about 80% of pollen while ventilating.


Although the air permeability is about 1/6, it has a gentle daylighting property and is said to be a privacy measure. Work is easy with double-sided tape that does not leave behind.


◆ Last fort !? Pollen catch curtain

"Pollen countermeasure curtain" is sold by Aswan as "pollen prevention measures that can be done in the interior". The sticky ingredients applied to the curtain catch pollen and house dust, and can be used repeatedly by washing.


The curtain itself is not sticky, and the feel is the same as a normal one. You may want to replace it only during the season.

◆ Measures for each house? "Smart house" equipped with HEPA filter

By the way, it's not a merchandise, but since it's a lifetime, there is a way to take measures against pollen throughout the house.

PanaHome's "smart homes" use a ventilation system that takes in fresh air from the base space (under the floor) instead of directly introducing outside air. In addition, it is said that a new ventilation system has been developed that is the first in the housing industry to be equipped with a HEPA filter as standard equipment and can remove fine particles such as PM0.5, which are even finer than PM2.5.


The amount of pollen that dances outside cannot be reduced, but it seems that the amount that enters the body can be reduced by devising indoors and outdoors. How about reviewing the measures once again before March, when the peak is in full swing?